The application discloses an improved transparent bladeless obturator comprising a proximal handle, a distal-end portion and a shaft therebetween, the handle and the shaft including a generally-aligned axis aperture, the distal-end portion including a transparent tip, from the distal end to the proximal end, said transparent tip divided into a top-portion, a spear-portion, a transition-portion and a base-portion； the top-portion includes an apex and a rotary-wall extending axially from the apex to the proximal end and gradually increasing in a transverse direction, the rotary-wall limiting a hollow cone； the main-portion including a main-body wall, the rotary-wall and the main-body wall extend to be intersected and form a circular field of vision； the sweeping-wall extends axially from the distal end to the proximal end and gradually increases in a transverse direction； and the spear-portion includes the first transverse-portion and the second transverse-portion.
